With that come topics that some adults would prefer them to avoid.
"When teachers or leaders say we cannot cover a certain topic, we say OK, but if we get a question about it we will find a way to give the information," adds Elissa.
More than 600,000 Syrians have registered with the United Nations in Lebanon as refugees but the Lebanese government estimates there are more than a million already in the country.
By year’s end there could be two million, placing impossible strains on the resources of a small country mired in economic problems and on the international aid community.
Beirut, Lebanon - When Anthony Kerbage and Elissa Abou Khalil go into schools and scouts' clubs across Lebanon to talk about sex, there are certain topics such as abortion that raise hackles.
The two fourth-year medical students are among the enthusiastic volunteers and relaxed youth workers plugging the sex education gap left by Lebanon's social and religious authorities.
Because the matter of religious balance is a sensitive political issue, a national census has not been conducted since 1932, before the founding of the modern Lebanese state.
Consequently, there is an absence of accurate data on the relative percentages of the population of the major religions and groups.
The pair manage the peer educator programme within the Standing Committee On Sexual and Reproductive Health, including HIV/Aids (SCORA) at the Lebanese Medical Students' International Committee.
A Jonestown, Lebanon County man was arrested by Pennsylvania State Police on multiple charges of sexual assault of an 8-year-old girl in 2015.
Dustin Lee Miller, 31, was arrested for rape, criminal attempt to commit rape, indecent assault, endangering the welfare of children, corruption of minors, selling or furnishing liquor or malt brewed beverages to minors and harassment.
Unlike the governments of Jordan and Turkey, the Lebanese government has refused to build new refugee camps to house Syrian refugees.
With Syrian women and girls scattered throughout Lebanon in shabby rental accommodations, makeshift shelters, and abandoned buildings, aids groups say they often face sexual harassment and demands for sex from landlords, store owners, and Lebanese officials.